Grand Seiko Evolution 9 Spring Drive U.F.A.

The Grand Seiko Evolution 9 Spring Drive U.F.A., reference SLGB023, is a dive watch with a 40.8 mm titanium case. The blue dial has a gradient pattern inspired by light streaming into the deep ocean. The lug-to-lug measurement is 48.5 mm, and case thickness is 12.9 mm; water resistance is rated to 300 metres. Calibre 9RB1 is Spring Drive with 33 jewels and approximately 72 hours of power reserve. The watch has a power reserve indicator; the bezel rotates unidirectionally. A folding extension clasp with a lock and micro-adjustment closes the titanium bracelet. Above the dial is a sapphire crystal, with anti-reflective coating on its inner surface.